package com.sky.service.impl;

import com.sky.constant.MessageConstant;
import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ReportMapper;
import com.sky.result.Result;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {
    @Autowired
    private ReportMapper reportMapper;

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 营业数额数据统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result<TurnoverReportVO> turnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Double> list = new ArrayList<>();
        dateList.forEach(date -> {
            LocalDateTime min = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime max = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("status", Orders.COMPLETED);
            map.put("min", min);
            map.put("max", max);
            Double turnover = reportMapper.getByMap(map);
            turnover = turnover == null ? 0 : turnover;
            list.add(turnover);
        });
        TurnoverReportVO vo = TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(list, ","))
                .build();
        return Result.success(vo);
    }


    /**
     * 总用户和新增用户
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result<UserReportVO> userStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> newUserList = new ArrayList<>();
        List<Integer> totalList = new ArrayList<>();
        dateList.forEach(date -> {
            LocalDateTime min = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime max = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("max", max);
            Integer newUsers = reportMapper.getUser(map);
            newUserList.add(newUsers);
            map.put("min", min);
            Integer totalUser = reportMapper.getUser(map);
            totalList.add(totalUser);
        });
        UserReportVO vo = UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalList, ","))
                .build();

        return Result.success(vo);
    }

    /**
     * 订单统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result<OrderReportVO> orderStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        List<Integer> totalOrdersCountList = new ArrayList<>();
        List<Integer> validOrdersCountList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime min = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime max = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("min", min);
            map.put("max", max);
            Integer totalOrders = reportMapper.getOrders(map);
            totalOrdersCountList.add(totalOrders);
            map.put("status", Orders.COMPLETED);
            Integer validOrders = reportMapper.getOrders(map);
            validOrdersCountList.add(validOrders);
        }

        Integer totalOrdersCount = totalOrdersCountList.stream().reduce(Integer::sum).get();
        Integer validOrdersCount = validOrdersCountList.stream().reduce(Integer::sum).get();
        Double orderCompletionRate = 0.0;
        if (totalOrdersCount != 0) {
            orderCompletionRate = validOrdersCount.doubleValue() / totalOrdersCount;
        }
        OrderReportVO vo = OrderReportVO.builder()
                .dateList(StringUtils.join(dateList , ","))
                .orderCountList(StringUtils.join(totalOrdersCountList , ","))
                .validOrderCountList(StringUtils.join(validOrdersCountList , ","))
                .totalOrderCount(totalOrdersCount)
                .validOrderCount(validOrdersCount)
                .orderCompletionRate(orderCompletionRate)

                .build();


        return Result.success(vo);
    }

    /**
     * top10
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public Result<SalesTop10ReportVO> top10(LocalDate begin, LocalDate end) {
        LocalDateTime min = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime max = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> top10List = orderMapper.getSetmeal(min,max);

        List<String> nameList = top10List.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> numberLiet = top10List.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());

        SalesTop10ReportVO vo = SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList,","))
                .numberList(StringUtils.join(numberLiet,","))
                .build();

        return Result.success(vo);
    }
    /**导出近30天的运营数据报表
     * @param response
     **/
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            sheet.getRow(1).getCell(1).setCellValue(begin + "至" + end);
            //获得第4行
            XSSFRow row = sheet.getRow(3);
            //获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());
            for (int i = 0; i < 30; i++) {
                LocalDate date = begin.plusDays(i);
                //准备明细数据
                businessData = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            //关闭资源
            out.flush();
            out.close();
            excel.close();

        }catch (IOException e){
            e.printStackTrace();
        }
    }
}
